Punka.



No. 741,438. PATENTED OCT. 13, 1903.

S. R. BAILDON.

PUNKA.

APPLICATION FILED AUG. 23. 1901' no MoDEL.

MAW

IN "h 11. 5 '!j b No. 741,438. PATENTED OCT. 13, 1903.

S. R. BAILDON.

PUNKA.

APPLIOATION FILED AUG. 23. 1901.

N0 MODEL. v 2 SHEETS-SHEET 2.

Patented October 13, '1 903.

SAMUEL ROBERT BAILDON, OF LONDON, ENGLAND.

PUNKA.

SPECIFICATION forming part of Letters Patent No. 741,438, dat d Oct b 13, 1903.

Application filed August 23, 1901- Serial No. 73,008. (No model.)

jointed rods to the ceiling of the room in which it is fitted, the said beam being reciprocated by a rope from one side only, so that it receives a positive motion in one direction only. Such punkas are usually operated by manual power, and althoughmany attempts have been made to drive them by mechanical means none of these attempts have proved entirely successful in practice.

The fundamental difficulties met with in driving punkas as ordinarily used by mechanical means consists, mainly, in the unsuitability of flexible or non-rigid connections with the point of suspension and the absence of necessary bearings through which the punka receives a positive motion in one direction only and the fact that a fixed throw being given to the punka-bearn causes variation in the are through which the punka travels, according to the length of suspension from the ceiling.

Now my invention has for its object to obviate the above-mentioned disadvantages, and to this end I provide a punka so arranged that although a fixed throw is imparted to it, yet its distance from the ceiling or the like to which it is suspended can be varied to suit requirements without altering its lift.

In the accompanying drawings, Figure 1 is a front elevation of a punka constructed according to the invention. Fig. 2 is a side elevation thereof. Fig. 3 is a sectional view of a detail drawn to a larger scale. Fig. 4 is a front.elevation showing a modified arrangement for hinging the punka to the support. Fig. 5 is a front elevation showinga method of suspending the punka to a wall-bracket. Fig. 6 is a side elevation showing the mode of connecting two punkas together tandem Fig. 7 is a front elevation showing fashion.

two punkas coupled together in the same plane. Fig. 8 is a front elevation showing a modified construction of supporting-frame. Fig. 9 is a front elevation showing a telescopic punka-frame. Fig. 10 is a similar view showing a modified arrangement for extending the punka-frame, and Fig. 11 is a front elevation showing the lower portion of a punkaframe provided with lateral extensions.

The punka comprises a light rigid framework, which is preferably made of metal tubing, as shown, although it may be made of angle or flat metal, the said frame comprising the bottom piece or rod (1, upon which the curtain or fan 1) can be hung, and two side pieces 0 c, which may be either parallel to one another or may converge toward one another, as shown in Fig. 1, the said side bars 0 a being secured at their upper ends to the spindle ct. This spindle is mounted in bearings e e in the lower end of a hanger or bracket 6, adapted to be secured to the ceiling, as shown in Figs. 1, 2, 6, and 7, or to a wall, as shown in Fig. 5. The spindle (Z has keyed upon it a crank d, which is adapted to be reciprocated by the rod d Fig. 2, actuated by any suitable means, such as a gasengine, an electromotor, or the like.

To enable the punka togive a uniform travel from a given crank throw in rooms of diiferent height, the hanger or bracket 6 is madein suchamanner that its length can be varied. For example, it can be constructed with removable sections 6 6 so that by using sections of different lengths the distance from the punka to the hanger to which it is suspended can be varied as desired, the point of suspension of the punkaframe 0, however, always remaining at the same distance from the suspension-spindle d, so that the throw remains constant. Fig. 3 shows asuitable joint for securing the sections or lengths e e to the extremities e e of the support. It comprises a nut f, which is pivotally held in the extremity e and which is internally screw-threaded, so as to engage the screwthreaded end of the length (2- It will be clear, however, that I can use any other suitable form of connection.

In the arrangement shownin Fig. 4 the spindle d, connecting the upper ends of the side bars 0 c of the punka-frame, instead of being mounted in bearings e c, as in the arrangement shown in Figs. 1 and 2, is suspended to the lower extremities of the bracket e by means of knuckle-joints g g.

It will be clear that-when a number of punkas are required in a single room it is not necessary to operate each punka independently, as the said punkas can be coupled together by suitable means. In the arrangement shown in Fig. 6 two punkas of the aforementioned construction are suspended parallel to one another and are coupled together by means of the rod 77., which is forked at either end, the two forks being pivoted to lugs h, Fig. 1, fitted to the bottom bar act the punka-frame, or I may couple up the punkas in the same longitudinal plane, and in this case the punka-frames c are suspended upon the common spindle d, as clearly shown in Fig. 7.

When a very light punka is required, I advantageously form the framework in the form of an inverted T, as shown in Fig. 8,

the vertical limb of which is provided with lateral pivots, which are mounted in bearings e e in the ceiling-bracket e. a is a lug on the lower bara, to which a rod can be connected for reciprocating the punka. This form is especially suitable for use on railwaycars, ship-cabins, and like places.

It is sometimes required to adjust the position of the cloth or fan b, and to this end I make use of the construction shown in Fig. 9. The said cloth or fan bis mounted upon a rod 2', having at its two extremities upright rods j, which work in socketsk 7r, formed upon the ends of the bottom bar a of the punkaframe. By sliding the rods j in the sockets the position of the cloth I) can be adjusted, and it can be held in the position to which it is adjusted by means of the set-screws H, which work in screw-threaded holes in the sockets 7c is and clamp the rods j, or I may employ the construction shown in Fig. 10, wherein the punka-cloth b is held on a rod i, which is connected to the bottom bar a of the punka-frame by means of the lazytongs links m m. In this case it may happen that the lazy-tongs do not give the required rigidity to the punka as a whole when extended, and I can therefore employ in conjunction with the said lazy-tongs lateral rods jj, working in sockets k k, as shown in Fig. 9.

To enable the length or width of the punka to be increased when desired, I pivot extra lengths or rods 02 n to the extremities of the bottom bar a of the frame, as shown in Fig. 11, the said bars being when not required for use folded up against the side bars 0 c of the frame, as shown in the broken lines of the figure, and turned down in alinement with the base a of the frame when required for use, as shown in the full lines. Extra lengths of cloth I) can then be mounted upon these rods n.

Having now particularly described and ascertained the nature of my said invention and in what manner the sameis to be performed, I declare that what I claim is 1. In a punka, the combination with the swinging frame, of supporting-bearings therefor, ceiling-supports, nuts provided with external threaded projections engaging said ceiling-supports and provided withinternallythreaded portions and rods detachably engaging the internally-threaded portions of said nuts and connecting the bearings to said ceiling supports, and the swinging frame mounted in said bearings, substantially as described.

2. In a punka, the combination with the supporting devices, of aswinging fan-frame, the said fan-frame being provided with pivoted arms for increasing the area of the fan, substantially as described.

SAMUEL ROBERT BAILDON.

Witnesses:

JOHN E. BOUSFIELD, O. G. REDFERN. 

